Appeal No. 1998-0892
Application No. 08/509,795
Representative claim 8 is reproduced as follows:
8. A noise removing circuit for a hand-written character
recognition device comprising:
an input unit having an input portion on which a
character is written;
detecting means for detecting coordinate points of a
character written on said input portion in a written order
thereon;
noise candidate specifying means for specifying two noise
candidate coordinate points one of which is to be removed as a
noise coordinate point, said noise candidate coordinate points
being consecutive in the written order;
vector calculation means for calculating vectors between
one of the noise candidate coordinate points and coordinate
points detected prior to and subsequent to the noise
coordinate points in the written order, for each of the noise
candidate coordinate points, respectively;
angle calculation means for calculating angles between
the vectors calculated for each of the noise candidate
coordinate points, respectively;
noise identifying means for analyzing positional
variations of the noise candidate coordinate points from the
coordinate points written prior to and subsequent to the noise
coordinate points on the basis of a direct comparison of the
angle calculated for one of the noise candidate coordinate
points with the angle calculated for the other noise candidate
coordinate point, and for determining one of the noise
candidate coordinate points whose positional variation is
greater than that of the other noise candidate coordinate
point as a noise coordinate point; and
noise removing means for removing the noise coordinate
point determined as the noise coordinate point from the
coordinate points detected by said input means.
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